The research achievements of the protection of fault arc at abroad were reviewed.
综述国外近年来在电弧故障防护方面的研究成果。
The physical phenomenon of fault arc was described and the standard of the protection of fault arc was introduced.
在阐述故障电弧物理现象的基础上，介绍了故障电弧防护标准。
On account of the weak fault current and unstable fault arc, the problems of the single phase to ground fault line selection in the non-solid earthed network have never been thoroughly resolved.
由于故障电流小、电弧不稳定等原因，小电流接地系统单相故障选线问题始终没有得到彻底解决。
On account of the weak fault current and unstable fault arc, the problems of the single phase to ground fault line selection in the non-solid earthed network have never been thoroughly resolved.
由于故障电流小、电弧不稳定等原因，小电流接地系统单相故障选线问题始终没有得到彻底解决。
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